install_ns-aws.sh: remove k8s cruft
install_ns-aws.sh: remove k8s cruft

It's always hard to jettison code that you've written recently on a
weekend, but that setup--a remote AWS k8s worker--doesn't work for me.

cunnie/bin,cunnie/bin,cunnie/bin,cunnie/bin,cunnie/bin,cunnie/bin,cunnie/bin